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- From: sgrigsby@falcon.aamrl.wpafb.af.mil
- Newsgroups: misc.fitness
- Subject: Re: What's an aerobic exercise? What isn't?
- Message-ID: <1992Nov19.121905.1837@falcon.aamrl.wpafb.af.mil>
- Date: 19 Nov 92 12:19:05 EST
- References: <1992Nov14.180240.18210@cbnewse.cb.att.com> <BxtJFK.9zn@mail.boi.hp.com> <jamesp.722051687@bison>
- Organization: USAF AL/CFH, WPAFB, Dayton, OH
- Lines: 32
-
- In article <jamesp.722051687@bison>, jamesp@cs.uwa.oz.au (James Pinakis) writes:
- > In <1992Nov17.150847.21341@oakhill.sps.mot.com> mack@oakhill.sps.mot.com (Gregg Mack ( Sun )) writes:
- >
- >>The physical activity need not be non-stop, but the elevated heart
- >>rate must be continued. A five second rest stop is not long enough
- >>for the heart rate to drop out of the target zone.
- >
- > What about people in stressful situations whose heart-rates are continuously
- > elevated (racing car drivers come to mind). Are they doing aerobic exercise?
- > If not, why?
- >
- > james
- --
-
- No, it's not the same. In aerobic exercise, the heart responds to an increase
- in metabolic demand due to an increase load on the muscles. The increased
- heart rate serves to circulate blood in order to keep the muscles processing
- their fuel efficiently. In stressful situations, the heart responds to
- hormones released by the endocrine glands in order to prepare the body for
- exertion (similar to the old "fight or flight" reaction). Studies have shown
- that stress affects the heart much differently than exercise because of the
- actions of these hormones. Long term stress is actually harmful to cardiac
- tissue while long term aerobic activity is beneficial.
-
- Squib
-
- -----------------------------------------------------------------------------
-
- "The opinions and views expressed here are strictly my own and do not
- necessarily reflect the official position of either the U.S. Air Force
- or its contractors."
-
-